Lauren Cohan. Actress: The Boy. Lauren Cohan is a British-American actress and model, best known for her role as Maggie Greene on The Walking Dead (2010) and recurring roles on The Vampire Diaries (2009), Supernatural (2005), and Chuck (2007). After her film debut on Casanova (2005) as Sister Beatrice, she starred in the sequel to Van Wilder (2002), Van Wilder: The Rise of Taj (2006), as Charlotte Higginson. Her next...